Roller skate



FIG. 1 is a right side elevational view of a roller skate showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof; and

FIG. 7 is a perspective view thereof.

The pole member has been shown in fragment in FIGS. 1, 2, 3, 6 and 7 to indicate indeterminate length. 

The ornamental design for a roller skate, as shown and described. 